9
G
Part name
Model
Sign
Function
Date
Compressor
AU282
Capacity control, meet indoor load
request by adjusting the frequency
Motor resistance
(at 20°C): 0.88Ω
AU482
Motor resistance
(at 20°C): 0.29Ω
AU48/60N
Motor resistance
(at 20°C): 0.53Ω
Pressure switch
ALL
HP
High pressure protection
4.15Mpa, OFF
LP
Low pressure protection
0.05Mpa, OFF
Electronic expansion
valve
ALL
PMV
In heating, refrigerant flow control
¢
2.4
Solenoid valve
ALL
SV1
Keep balance of high/low pressure
when compressor starts up or stops
AC220V
SV2
Refrigerant jet protection when
discharging temp. is too high
4-way valve
ALL
4WV
Change over between cooling and
heating
AC220V, electrified in heat;
not electrified in cooling or
defrosting
Temp. sensor
ALL
Te
Check frost condition of outdoor
heat exchanger
R (25°C)=10K B
(25/50°C)=3700K
Ts
Detect the suction temp. of
compressor
Tc
Check the temp. of main pipe of
condenser gas pipe control PMV in
heating
Ta
Detect ambient temp. set primary
setting for fan speed target
pressure and PMV open angle
Td
Detect the discharging temp. of
compressor
R (80°C)=50K B
(25/80°C)=4450K
Heater
AU282
HEATER
Used to heat oil in compressor
25W, 220V
AU482/48N/60N
28W, 220V